Three, see:
https://www.quora.com/How-many-javel...s-usually-have
In encumbrance terms that's
3x Javelin 9 pounds
Small shield 10 pounds
Cloth armor 14 pounds
Rapier 1 pound
Waterskin 2 pounds
Backpack 4 pounds
2 days rations 2 pounds
Labyrinth kit 6 pounds
Total: 48 pounds or 5.33 x ST, MA reduced to 8